Device for cutting boiler-tubes



(No Model.)

C. 0. THIEME. l DEVICE EOE CUTTING BOILEE TUBES.. No. 512,631'. PatentedJan. 9, 1894..A

`lPIE# 4f 3 4a ,f' .l 4 l \/j lUNITED STATES PATENT OFFICE.

CARL OTTO THIEME, OF ST. LOUIS, MISSOURI.

DEVICE FOR CUTTING BOlLER-TUBES.

SPECIFICATION forming part of Letters Patent No. 512,631, dated January9, 1894.

Application filed July 24, 1 8 93.

` the city of St. Louis and State of Missouri,

have invented certain new and useful Improvements in Devices for CuttingBoiler- Tubes, of which the following isa full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart hereof. I f

My invention relates to an improvement in a device for cutting boilertubes, and consists in the novel construction, combination andarrangements of parts as will be more fully hereinafter described anddesignated in the claims.

In the drawings: Figure 1 isa longitudinal central section of myinvention showing its connection with a boiler tube. Fig. 21's asectional view through the line 2-2 of Fig. 1. Fig. 3 is a sectionthrough the line 3 3 of Fig. 1. Fig. et is a perspective view of acutter which I use in carrying out myin'vention. Flg. 51s a perspectiveview of a detail which I u se 1n carrying out myinvention. Fig. 6 is aside elevation of a locking device with parts broken away to moreclearly exhibit the same.

1 indicates a flue-sheet and 2 a boiler-tube which is of commonconstruction.

3 lndlcates a shaft which is screw-threaded 'on one end and is providedwithahand nut 4.

Mounted on the opposite end of the shaft 3 from the screw threads isaconical enlargement 5,v the small end of which is formed on or fixed tothe shaft 3. y

Formed in the enlarged portion 5 are guideways 6 for the purposehereinafter mentioned.

7 indicates a cylindrical casting.

The end adjacent to the boiler ue is provided with an enlarged portion8. The interror of the enlarged portion 8 is conical in shape to admitthe enlarged portion 5 to be lnserted therein.

Mounted upon the cylindrical casting 7 and screw threaded upon its outerperiphery is a sleeve or casting 9; said casting is tapered so that itis somewhat larger on its outer end for the purpose hereinaftermentioned.

Formed on the outer end of the casting 9 1s an annular fiange lO.

Formed in the outer edge of the flange 10 are notches 11.

Mounted on the cylindrical casting 7 adj aserinno. 481,308. (No man.)

jacent to the outer end of the casting 9 is a handle 12; that portion ofthe handle 12 which engages the casting 7 is provided with a slot oropening 13.

Mounted in the slot 13, and connecting the casting 7 to the handle 12 isa ratchet-wheel 14 and a pawl 15; said pawl 15 is adapted to engage theratchet-wheel 14 for the purpose hereinafter mentioned.

Mounted on the side of the handle 12 adjacent to the casting 9 is a bolt16, the bolt 16 being held in engagement with said handle by means ofstraps 17 and 18. The upper end of the bolt 16 is provided with aprojection or lift 19.

Mounted in the bolt is pivoted at 21.

Directly back of the pawl 2O adjacent to its lower end is a coiledspring 22 for the purpose of holding the pawl in its outward position asshown in Fig. 6.

Formed in the enlarged portion S of the casting 7 are slots or openings23.

Mounted in the openings 23 are cutters 24; these cutters are pivoted at25.

26 indicate lugs formed on the inner edge of the cutters 24 to engagethe guide-ways 6 in the conical or enlarged portion 5 on the end of theshaft 3.

The operation is as follows: When it is desired to apply my improvedcutter to a boilertube, the operator pushes the pawl in out ofengagement with the strap 18 and pushes the bolt 16 down in engagementwith the notch 11, as shown in dotted lines in Fig. 2. Then the operatordraws the handle down in position as shown in dotted lines in Fig. 2,which allows the pawl 15 to fall out of engagement with theratchet-wheel 14. Vthen the pawl is out of engagement with saidratchet-wheel, the handle may be turned loosely on the casting 7,y andthe screw-threaded casting 9 and said handle being locked together bysaid bolt, said casting 9 can be screwed into the tube 2 by manipulatingsaid handle, and the tube cutter will thereby be held securely inposition ready for use in cutting the tube, as shown in Fig. 1. Thenthis is done the operator releases the bolt 16 from the notch 11 andbrings the handle back in position as shown in Fig. 1, and when thehandle is in said position the pawl 15 will drop down in.

16 is a pawl 2O which IOO engagement with the ratchet-wheel14. When thecutter is placed in the tube ashere shown, the operator turns on thehand nut 4 the required direction to screw it on the shaft 3. By sodoing it draws the enlarged portion 5 inwardly. The projection 26 of thecutter 24 being in engagement with the guide-ways 6 presses themoutwardlyand brings them in engagement with the inner surface of the iue2. The ratchet wheel14 and the cutters 24 being connected to the casting7 when the ratchet wheel 14 is turned in the required direction it willalso turn the cutters. The pawl 15 being connected to the handle 12 andin engagement with the ratchet wheel 14 when the handle 12 is oscillatedit will turn said ratchet wheel. When the cutters begin to cut into thetube the operator turns the hand nut 4in the required direction, thuskeeping the cutters 24 pressed against the flue.

From the above description, it will be seen that I have provided a tubecutter with a stock and laterally movable cutters, means for securelylocking the stock in position upon the interior of the tube to be cut,means for rotating the cutters to cut the tubes, and means forsimultaneously feeding said cutters laterally.

What I claim isl. In a tube cutter, the combination with the stock andlaterally movable cutters, of a tapered integral sleeve threaded uponits outer surface, means whereby said sleeve may be rotated to securelyclamp said stock and said cutters in position within the tube to be cut,

means for rotating theicutters to cutthe tube and means forsimultaneously feeding them laterally, substantially as hereinspecified.

2. In a device for cutting boiler tubes, the combination of acylindrical casting 7, an enlarged portion 8 formed on one end of saidcasting, a shaft 3 mounted in said cylindrical casting 7, an enlarged orconical portion 5 mounted on said shaft 3, guideways 6 formed in theenlarged or conical'portion, cutters 24 mountedin the enlarged portion 8of the casting 7, projections 26 on said cutters in engagement with theguideways 6 formed in the enlarged or conical end 5 of the shaft 3, acasting 9 screw threaded on its outer periphery, an annular flange 10 onone end of said casting, notches 11 formed in said flange, a handlemounted on said casting 7, a slot 13 formed in said handle, aratchet-whee114 placed in said slot, and a pawl 15 connected to saidhandle and constructed to engage said ratchet-wheel, substantially asset forth.

3. In a device for cutting boiler-tubes, a handle 12, straps 17 and 18connected to said handle, a bolt mounted in said straps, apawl 2Omounted in said bolt, and a spring 22 for retaining the pawl in itsoutward position, substantially as set forth.

In testimony whereof I aiiix my signature in presence of two witnesses.

CARL OTTO THIEME.

Witnesses:

A. A. BLANKENMEISTER, JN0. C..HIGDoN.

